json如何转换成xml

Posted 2023-05-01

参考技术A 网上都有XML和json互相转换的工具，在线就可以转换。注意XML必须有单一的根节点。

<?xml version="1.0" encoding="UTF-8" ?>
<root>
<node>
<id>1</id>
<text>系统维护</text>
<children>
<id>user</id>
<text>人员维护</text>
</children>
<children>
<id>role</id>
<text>角色维护</text>
<iconCls>icon-reload</iconCls>
</children>
</node>
<node>
<text>开发维护</text>
<children>
<text>元数据</text>
<state>closed</state>
<children>
<text>编辑样式</text>
</children>
<children>
<id>dataview</id>
<text>数据视图</text>
</children>
</children>
<children>
<text>权限资源</text>
</children>
</node>
</root>

xml转换成json

package it.huanyu;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import org.apache.log4j.Logger;
import org.dom4j.*;

import java.io.File;
import java.io.FileInputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.List;

public class XmlToJsonUtils {
	private static Logger logger = Logger.getLogger(XmlToJsonUtils.class);

	public static void main(String[] args) throws Exception {
		// String xmlStr= readFile("D:/ADA/et/Issue_20130506_back.xml");

		String xmlStr = "<auth_response status=\"OK\" xmlns=\"http://www.fnac.com/schemas/mp-dialog.xsd\">"
				+ "<token>00E9822E-E926-C274-53BF-A2784195A3CE</token>"
				+ "<validity>2018-03-23T10:45:21+01:00</validity>" + "<version>2.6.0</version>" + "</auth_response>";
		String xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<batch_status_response status=\"OK\">"
				+ "<batch_id>DC3F089A-8E98-4B98-9434-0DF0EE937DC8</batch_id>" + "<offer status=\"OK\">"
				+ "<product_fnac_id>2499187</product_fnac_id>"
				+ "<offer_fnac_id>E473361D-683B-2A26-E878-F43816B9E111</offer_fnac_id>"
				+ "<offer_seller_id>561C-385-9BE</offer_seller_id>" + "</offer>" + "<offer status=\"OK\">"
				+ "<product_fnac_id>9784515</product_fnac_id>"
				+ "<offer_fnac_id>4EF5F02D-8A87-9502-95F5-14881CDEEF8A</offer_fnac_id>"
				+ "<offer_seller_id>B067-F0D-75E</offer_seller_id>" + "</offer>" + "<offer status=\"OK\">"
				+ "<product_fnac_id>20005761</product_fnac_id>"
				+ "<offer_fnac_id>B42974D3-D5E0-DAF1-629C-60541775D944</offer_fnac_id>"
				+ "<offer_seller_id>B76A-CD5-153</offer_seller_id>" + "</offer>" + "</batch_status_response>";

		Document doc = DocumentHelper.parseText(xml);
		JSONObject json = new JSONObject();
		dom4j2Json(doc.getRootElement(), json);
		System.out.println("xml2Json:" + json.toJSONString());

	}

	public static String xmlToJson(String xml) {
		Document doc;
		try {
			doc = DocumentHelper.parseText(xml);
			JSONObject json = new JSONObject();
			dom4j2Json(doc.getRootElement(), json);
			System.out.println("xml2Json:" + json.toJSONString());
			logger.warn("xml2Json:" + json.toJSONString());
			return json.toJSONString();
		} catch (DocumentException e) {
			logger.warn("数据解析失败");
		}
		return null;

	}

	public static String readFile(String path) throws Exception {
		File file = new File(path);
		FileInputStream fis = new FileInputStream(file);
		FileChannel fc = fis.getChannel();
		ByteBuffer bb = ByteBuffer.allocate(new Long(file.length()).intValue());
		// fc向buffer中读入数据
		fc.read(bb);
		bb.flip();
		String str = new String(bb.array(), "UTF8");
		fc.close();
		fis.close();
		return str;

	}

	/**
	 * xml转json
	 * 
	 * @param xmlStr
	 * @return
	 * @throws DocumentException
	 */
	public static JSONObject xml2Json(String xmlStr) throws DocumentException {
		Document doc = DocumentHelper.parseText(xmlStr);
		JSONObject json = new JSONObject();
		dom4j2Json(doc.getRootElement(), json);
		return json;
	}

	/**
	 * xml转json
	 * 
	 * @param element
	 * @param json
	 */
	public static void dom4j2Json(Element element, JSONObject json) {
		// 如果是属性
		for (Object o : element.attributes()) {
			Attribute attr = (Attribute) o;
			if (!isEmpty(attr.getValue())) {
				json.put("@" + attr.getName(), attr.getValue());
			}
		}
		List<Element> chdEl = element.elements();
		if (chdEl.isEmpty() && !isEmpty(element.getText())) {// 如果没有子元素,只有一个值
			json.put(element.getName(), element.getText());
		}

		for (Element e : chdEl) {// 有子元素
			if (!e.elements().isEmpty()) {// 子元素也有子元素
				JSONObject chdjson = new JSONObject();
				dom4j2Json(e, chdjson);
				Object o = json.get(e.getName());
				if (o != null) {
					JSONArray jsona = null;
					if (o instanceof JSONObject) {// 如果此元素已存在,则转为jsonArray
						JSONObject jsono = (JSONObject) o;
						json.remove(e.getName());
						jsona = new JSONArray();
						jsona.add(jsono);
						jsona.add(chdjson);
					}
					if (o instanceof JSONArray) {
						jsona = (JSONArray) o;
						jsona.add(chdjson);
					}
					json.put(e.getName(), jsona);
				} else {
					if (!chdjson.isEmpty()) {
						json.put(e.getName(), chdjson);
					}
				}

			} else {// 子元素没有子元素
				for (Object o : element.attributes()) {
					Attribute attr = (Attribute) o;
					if (!isEmpty(attr.getValue())) {
						json.put("@" + attr.getName(), attr.getValue());
					}
				}
				if (!e.getText().isEmpty()) {
					json.put(e.getName(), e.getText());
				}
			}
		}
	}

	public static boolean isEmpty(String str) {

		if (str == null || str.trim().isEmpty() || "null".equals(str)) {
			return true;
		}
		return false;
	}
}